Monatshefte für Chemie / Chemical Monthly

, Volume 106, Issue 4, pp 925–939 | Cite as

Massenaufgelöste Übergangssignale der Ionen C3H5O+ und C4H7O+

  • Peter Krenmayr
Anorganische, Struktur-und Physikalische Chemie

Mass-resolved metable peaks of the ions C3H5O+ and C4H7O+


Abundance ratios of C2H4 and CO loss (CH4 and O loss) in the field-free region of a mass spectrometer have been determined by mass resolution of metastable peaks. Using the method ofShannon andMcLafferty the abundance ratios have been applied to characterize the structure of metastable ions. C3H5O+ ions from 10 compounds and C4H7O+ ions from 14 compounds have been examined. In the case of C3H5O+, three types of structurally different isomers are present. C4H7O+ ions represent a not equilibrating mixture of different. structures in some cases. From examination of 2-pentanone-1,1,1,3,3-d5, metastable C4H7O+ ions from 2-pentanone have been shown to consist of two structurally distinct types of ions which are assumed to be
$$\begin{array}{*{20}c} {CH_2 - O^ + } \\ {\begin{array}{*{20}c} | & {||} \\ \end{array} } \\ {CH_2 - C - CH_3 } \\ \end{array}$$
and butyryl ion.


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • Peter Krenmayr
    • 1
  1. 1.Institut für Allgemeine Chemie der Technischen Hochschule WienWienÖsterreich

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